Abstract:
A method and continuous casting device for dynamically placing rolling segments against a cast bar made of metal, particularly steel. The continuous casting device is a bloom or billet casting device and has pairs of rollers that are placed against each other in a position-controlled and pressure-controlled manner by piston-cylinder units. The hydraulic pressure is switched from position-controlled operation to pressure-controlled operation when a threshold pressure is reached. The roller segments are arranged in the hot bar zone and the soft reduction zone.
Abstract:
The invention relates to a device and a method for supporting and guiding a cast strand in a strand guiding device (100) after leaving a continuous casting mould. The strand guiding device (100) comprises at least one segment, which has a first roller bridge (114-1) on one wide side of the cast strand and a second roller bridge (114-2) on the opposite wide side of the cast strand, wherein at least one roller is rotatably mounted respectively on the first and second roller bridges to support and guide the cast strand. To allow the guidance of the strand and the strand to be made more flexible, it is proposed according to the invention to provide at least a first setting element (118-3) for connecting the first roller bridge (114-1) to a first fixed land and for individually positioning the first roller bridge with respect to the neutral phase (N) of the cast strand, and at least a second setting element (118-2) for connecting the second roller bridge (114-2) to a second fixed land and for individually positioning the second roller bridge with respect to the neutral phase (N) of the cast strand.
Abstract:
The invention relates to a roll (1) for metal production and/or metal processing, in particular a continuous casting roll, which has a roll parent body (2) of metal and a coating (3) of wear-resistant material applied to said roll parent body (2). In order to make the roll, in particular the continuous casting roll, especially wear-resistant, the invention provides for the coating (3) to have electrolytically applied nickel, wherein the surface (4) of the coating (3) forms the working surface of the roll (1). Furthermore, the invention relates to a method of producing a roll (1) for metal production and/or metal processing, in particular a continuous casting roll.
Abstract:
A method of and a device for determining the position of the solidification point (1a) in a strand (1) during continuous casting of liquid metals, in particular of steel, lead to precise results, while an indirect measurement of a movable amount of a core liquid volume per unit of length is carried out by direct measurement of generated process parameters by force and/or path signals on fixed or adjustable individual support rollers or groups of fixed or adjustable support roller pairs, and based on the measurement values, a calculation model for a momentary position of the solidification point (1a) is produced, based on which, changeable casting parameters are continuously adjusted.
Abstract:
A method for the continuous casting and direct deformation of a metal strand, especially a cast steel strand, includes guiding the metal strand in a curved strand glide after the continuous casting mold, subjecting the strand to a secondary cooling with a liquid coolant, and preparing the strand in an automatically controlled way for the deformation pass at a uniform temperature field in the strand cross-section, such that the cast strand is cooled with a liquid coolant only in the longitudinal sections in which the cast strand is liquid in the cross-section. The temperature of the cast strand is equalized in a transition zone before, in, and/or after a bending-straightening unit by insulation of the exterior surface that is radiating heat, without the use of the liquid coolant, and is further equalized by heat radiation in zones until the temperature field consists of elliptical, horizontally oriented isotherms. The cast strand is deformed on a dynamically variable soft production line on the basis of the compressive strength measured by individual deforming rolls or roll segments, depending on the compressive force that can be locally applied.
Abstract:
The invention relates to a method and a continuous casting device for the direct shaping of a metal strand, in particular a steel cast strand (1) of any format (1d). According to said method, the cast strand (1) is only cooled by a liquid coolant (4) in longitudinal sections (6), where the interior of the cast strand (1) remains liquefied and the temperature of the cast strand (1) in a transition zone (7) upstream of, in and/or downstream of a bending and straightening unit (8) is evened out by an insulation of the exterior surface (1b), essentially without the use of a liquid coolant (4), and by progressive thermal radiation. The cast strand (1) is shaped in a dynamically variable reduction section (9) as a result of the compressive strength that is measured on individual shaping rolls (10) or roll segments (11), depending on the compressive force that can be locally applied.
Abstract:
A continuously cast strand is subjected to soft reduction between the guide rollers below the mold and between the soft reduction stretch and the mold the strand is subjected to format or thickness reduction between at least one pair of position controlled guide rollers so that independently of the quality of the steel, the casting speed and the spray cooling, the position of the type of the mold cavity and hence the molten steel therein is maintained constant along the soft reduction stretch.
Abstract:
The invention relates to a strip guide for a strip casting unit, comprising at least two segments, in particular roller segments (1-4), each with a strip input side (2.1) and a strip output side (3.1) and a pair of roller supports, each with a number of support rollers (5), running along a support region. The roller supports are adjustable by means of, in particular, hydraulic adjuster units (8). According to the invention, the strip guide can be more flexibly embodied and the assembly and disassembly times reduced, whereby a mechanical connection (9) is provided between neighbouring segments (1-4) and, on fitting a cylinder pair (8.1-8.4) to the strip input side (2.1) of a segment (1-4), the adjustment movement occurs both on said side (2.1), as well as simultaneously on the strip output side (3.1) of a previous segment connected thereto. On fitting a cylinder pair (8.1-8.4) to the strip output side (3.1) of a segment (1 4), the adjustment movement thereof affects said side (3.1), and simultaneously the strip input side (2.1) of a subsequent section connected thereto.
Abstract:
The invention relates to a method for adjusting the feed opening of segments for continuous casting systems, especially position-controlled segments for slab and thin-slab continuous casting systems which comprise a strand guide (1) with segments (2) for a predetermined guidance of a cast strand using measuring and control signals. In order to provide an independent intelligent segment, the measuring and control signals are processed in at least one system unit (14′) directly on the respective segment (2) and the set values are fed to the segment (2′) by a superordinate control system (10) via a field bus (11), for example a profibus and a power supply (12′). Actual values are returned to the control system (10′) via the field bus (11) as the result of control or as a process status. The system units (14) present on the segment (21) are supplied with segment-specific data such as rigidity coefficients, roller diameter, control parameters, feed opening basic settings and adjustment quota. The invention also relates to a device for carrying out the method.
Abstract:
In a method for casting prefabricated products in a continuous casting device, having a casting mold and a strand guide downstream of the casting mold, wherein the strand guide has rolls positioned opposite one another in pairs for supporting and guiding the solidifying cast strand, wherein some rolls are drive rolls and others are idle rolls, wherein drives are provided for the drive rolls, and wherein the drive rolls are adjustable against the cast strand in order to transmit guiding forces and strand conveying forces onto the cast strand in interaction with the idle rolls, the drive rolls and the drives are controlled to a preset rotational speed such that the drive rolls have circumferential speeds identical to one another within the limits of a preset casting speed. The motor torques of the drives are maintained at a level as equal as possible below a permissible torque limit value relative to a loadability of the strand shell.